As far as the new set goes I'm seeing a lot of support for tribal synergies as well as the push towards the Eldrazi. Here are a couple deck variations that can be done (or at least I see coming about in this new block);
(W/U) Spirits (W/B) Life gain W/ Sac engine (W/G/U) Tamiyo/Investigate (W/B/G) Eldrazi Cult
(U/B) Zombies (U/R) Spirits/Prowess (U/W/B) Spirits (U/R/W) Saint Traft aggro
(B/R) Vampires (B/G) Horrors/
Delirium (B/U/R) Stromkirk Control (B/G/U) "Growing Eldrazi"
(R/W) Angels/Humans (R/G) Werewolves (R/B/G) Aggro (R/W/B) Vampiric Army
(G/W) Human Tokens (G/U) Investigation (G/R/W) Human aggro (G/U/R) "Wild Spirits"
These are just some Ideas that I have for this new set coming out. They may be augmentations of older decks or they could be something completely new but they'll definitely be fun. As long as someone comes up with a deck that wipes out Eldrazi (since now all 3 eldrazi Titans are in STANDARD). I hope these decks give you some ideas Skeri.